An important change is coming (on July 1st) for Azure Information Protection which may affect users on Office 365 (more specifically the Exchange Online Message Encryption capabilities)

If you are using AD RMS (the on-premises digital rights management solution) to protect your data (including for users on Office 365) you must opt out for this change as soon as possible as the change may impact you negatively (this scenario is not supported for the coming change).

So if you are using AD RMS on-premises, to opt out the change you must connect to Exchange Online and run the following command